This is a two small Thadobati cups set. TcA#137 is an old bowl (18th century) and her twin flame TcA#135 was born in 20th century.. Two of these instruments individually are high quality and could be easily used separately. However, as a set they create magical patterns that scientifically called "binaural beats". The measurable binaural beats effect is present in this set on five levels, but it's far more that the frequency analyzer is refusing to pick!
The fundamental tones frequencies: TcA#137: 466hz-471hz (A#4 Concert)
The fundamental tones frequencies: TcA#135: 463hz-466hz (A#4 Concert)
Difference (binaural beats) between lower frequencies 466 and 463 is 3hz
Difference between higher frequencies 471 and 466 is 5hz
First overtone TcA#137: 1315-1319 (E6 Concert)
First overtone TcA#135: 1294-1301 (E6-17hz)
Binaural 21hz and 18hz
Second overtone TcA#137: 2431
Second overtone TcA#135: 2397
Excellent set for any kind of practice for both beginners and advanced level practitioners.
Both bowls are playing super smooth by rubbing the rim with the wooden end of the playing stick.
Set includes two complementary singing bowl cushions and two singing bowl mallets R2.
Size of TcA#137: 4.5/8"x2.3/8" (11.7x6cm)
Size of TcA#135: 4.3/8"x2.1/4" (12x5.6cm)